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The rms value of an alternating current...

The rms value of an alternating current

A

is equal to 0.707 times peak value

B

is equal to 0.636 times peak value

C

is equal sqrt2 times the peak value

D

none of the above

Text Solution

Verified by Experts

The correct Answer is:
A

`I_("rms")=I_0/sqrt(2) ~~ 0.707I_0`
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DC PANDEY-ALTERNATING CURRENT-Level - 1 Objective
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  2. Phasor diagram of a series AC circuit is shown in figure. Then,

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  3. The rms value of an alternating current

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  5. The impedasnce of sereis L-C-R circuit in an AC circuit is

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  6. If V0 and I0 are the peak current and voltage across the resistor in a...

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  7. A generator produces a time varying voltage given by V=240 sin 120 t, ...

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  8. An L-C-R series circuit has a maximum current of 5A. If L=0.5H and C=8...

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  9. The current and voltage functions in an AC circuit are i=100 sin 100...

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  10. A capacitor becomes a perfect insulator is

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  11. For an alternating voltave V=10 cos 100 pit volt, the instantenous vol...

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  12. In a purely resistive AS circuit,

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  13. Identify the graph which correctly reperesents the variation of capaci...

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  14. In an AC circuit, the impedance is sqrt3 times the reactance, then the...

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  15. Voltage applied to an AC circuit and current flowing in it is given by...

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  16. A current of 4A flows in a coil when connected to a 12V DC source. If ...

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  17. In the circuit shown in figureure, the reading of the AC ammeter is ...

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  18. An AC voltage is applied acrss a series combination of L and R. If the...

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  19. For wattless power is an AC circuit, the phase angle between the curre...

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  20. The correct variation of resistance R with frequency f is given by

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